PADI, Open Water Diver, Final Exam Review / Updated
All 56 Questions & Expert Verified Answers & Complete
Rationale / 2025/2026.
1) If an object is neutrally buoyant (does not sink or float) in fresh
water, the same object placed into salt water would
A sink.
B either sink or float.
C do nothing.
D float. - ANSWER-D
2) I blow up a balloon, tie it off, and take it to the bottom of the
swimming pool. What will happen to the balloon and the air inside it?
A The balloon will get bigger and the air inside the balloon will be less
dense (molecules move further apart).
B The balloon will get smaller and the air inside the balloon will be
more dense (molecules move closer together).
C The balloon will get bigger and the air inside the balloon will be more
dense.
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,D The balloon will get smaller and the air inside the balloon will be less
dense. - ANSWER-B
3) I turn a glass upside down, trap the air in it by putting it in water, and
then I take the glass down to 10 meters. The air space would
A become half the size it was at the surface.
B not change in size.
C become 1/3 the size it was at the surface.
D become 2/3 the size it was at the surface. - ANSWER-A
4) If I am not able to equalize (clear) my body air spaces, it may be
because I have
A seasickness.
B heart disease and high blood pressure.
C a cold, allergy or another medical problem.
D anxiety. - ANSWER-C
5) If my ears or sinuses hurt while I am descending (going down), it
usually means
A my air spaces are equalized.
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, B my mask strap is too tight.
C I am feeling a squeeze and need to equalize.
D my mask is too small. - ANSWER-C
6) The best place for me to position an alternate air source is
A loose by my side so I can find it fast.
B in the triangle area formed by my chin and the lower corners of my
rib cage.
C to the base of my cylinder.
D to the back of my BCD between my shoulder blades and waist. -
ANSWER-B
7) Lung overexpansion injuries can be caused by
A scuba diving without a buddy.
B continuing a dive when not properly weighted.
C not drinking enough water before scuba diving.
D holding my breath while scuba diving. - ANSWER-D
8) If my cylinder of air lasts 60 minutes while I am at the surface
breathing normally, assuming all else is the same, how long will it last at
20 meters breathing normally?
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All 56 Questions & Expert Verified Answers & Complete
Rationale / 2025/2026.
1) If an object is neutrally buoyant (does not sink or float) in fresh
water, the same object placed into salt water would
A sink.
B either sink or float.
C do nothing.
D float. - ANSWER-D
2) I blow up a balloon, tie it off, and take it to the bottom of the
swimming pool. What will happen to the balloon and the air inside it?
A The balloon will get bigger and the air inside the balloon will be less
dense (molecules move further apart).
B The balloon will get smaller and the air inside the balloon will be
more dense (molecules move closer together).
C The balloon will get bigger and the air inside the balloon will be more
dense.
1|Page
,D The balloon will get smaller and the air inside the balloon will be less
dense. - ANSWER-B
3) I turn a glass upside down, trap the air in it by putting it in water, and
then I take the glass down to 10 meters. The air space would
A become half the size it was at the surface.
B not change in size.
C become 1/3 the size it was at the surface.
D become 2/3 the size it was at the surface. - ANSWER-A
4) If I am not able to equalize (clear) my body air spaces, it may be
because I have
A seasickness.
B heart disease and high blood pressure.
C a cold, allergy or another medical problem.
D anxiety. - ANSWER-C
5) If my ears or sinuses hurt while I am descending (going down), it
usually means
A my air spaces are equalized.
2|Page
, B my mask strap is too tight.
C I am feeling a squeeze and need to equalize.
D my mask is too small. - ANSWER-C
6) The best place for me to position an alternate air source is
A loose by my side so I can find it fast.
B in the triangle area formed by my chin and the lower corners of my
rib cage.
C to the base of my cylinder.
D to the back of my BCD between my shoulder blades and waist. -
ANSWER-B
7) Lung overexpansion injuries can be caused by
A scuba diving without a buddy.
B continuing a dive when not properly weighted.
C not drinking enough water before scuba diving.
D holding my breath while scuba diving. - ANSWER-D
8) If my cylinder of air lasts 60 minutes while I am at the surface
breathing normally, assuming all else is the same, how long will it last at
20 meters breathing normally?
3|Page
